Dividers.



' PATENTED MAR. 31, 1903. J. O. EDGAR.

DIVIDERS.

APPLICATION FILED MAR. 28, 1902;

N0 MODEL.

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clamping attachment.

UNITED STATES PATE T OFFICE.

JASPER CUMMINGS "EDGAR, OF PLEASANTHILL, MISSOURI.

DIVIDERS.

SPECIFICATION forming part of Letters Patent N 0. 724,088, dated March 31, 1903:

Application filed March 28, 1902. Serial No. 100.469. (No model.)

State of Missouri, haveinvented new and use fulDividers, of which the following is a specification. p

This invention relates generally to dividers,

and particularly to that class employed by.

carpenters and other artisans in laying off work and in scribing circles on wood and other materials.

The object of the invention is to obviate the employment of the ordinary bindingscrew for clamping the arc in the leg and in lieu thereof to provide means adapted for ready attachment to a pair of dividers already in use,which will not only be thoroughly efficient for the purpose designed, but will have the added function of being associated with the dividers in such manner as to obviate danger of becoming accidentally detached therefrom and thus lost.

With these and other objects in view, as will appear as the nature of the invention is better understood, the same consists in the novel construction and combination of parts of an arc-clamping attachment for a pair of dividers,as will be hereinafter fully described and claimed.

In the accompanying drawings, forming a part of this specification, and. in which like numerals of reference indicate corresponding parts,there is illustrated one form of embodiment of the invention capable of carrying the same into practical operation, it being understood that the elements therein exhibited may be varied or changed as to shape, proportion, and exact manner of assemblage without departing from the spirit thereof, and in these drawings- Figure 1 is a viewin perspective of a pair of dividers equipped with one form of arc- V Fig. 2 is a detail sectional view taken through the arc and the clamping device, showing the manner of ooaction between the clamping means and the divider-leg. Fig. 3 is a perspective detail view of the arc-clamping attachment detached from the dividers.

Referring to the drawings, 1 designates a I as these parts may be of the usual or any preferred construction detailed illustration will be no change in the structural arrangement of the dividers other than the removal of the ordinary set-screw employed for clam ping the are. To assemble the attachment with the dividers, the ordinary set-screw is removed and the compass-legs are spread apart until the arc is out of engagement with the leg with which it coacts, and the two clips are then positioned upon the leg, as shown in Fig. 1, with their slots in register with the arc slot of the leg, and the legs are then closed to project the arc through the clip members. When it is desired to lock the legs at any desired adjustment, the clampinglever is turned down to the position shown in Fig. 1, thereby causing the cam-head to impinge the leg and force the clips outward, causing the outer wall in each of their arcengaging slots to bind against the arc, and thus hold the leg at the desired adjustment. When the lever is in the position named, the legs will be more firmly locked in adjusted position than could result from the employment of the ordinary set-screw,inasmuch as there is a double-locking action presented, resulting from the engagement between the' two clip members and the arc, the slots and the clip members bearing upon the entire width of the arc, and thus effecting the positive clamping defined.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a pair of arc-carrying dividers, the combination with the arc, of clamping devices through which the are projects, and means associated with the said devices and operating, by coaction with the divider-leg I ing a pair of clips or plates provided with through which the arc projects, to bind the arc-engaging slots, and a cam-bearing lever said devices against the arc. associated with the clips.

2. The combination with a pair of arc-car- In testimony that I claim the foregoing as 5 rying dividers, of locking means therefor my own I have hereto aflixed my signature in 15 comprising a pair of clips provided with slots the presence of two Witnesses.

to receive the arc, and a cambearing lever JASPER CUMMINGS EDGAR. associated with the clips, Witnesses:

As a new article of manufacture, an arc- ROY T. CLOUD, I0 clamping attachment for dividers, compris- N. P. HAYES. 

